“The Golden Age” is a collection of reminiscences of childhood. (Seven of the eighteen pieces had previously appeared in the National Observer.) Widely praised upon its first appearance, the book has come to be regarded as a classic in its genre.
Grahame's reminiscences, in “The Golden Age” (1895) and in the later “Dream Days” (1898), were notable for their conception "of a world where children are locked in perpetual warfare with the adult 'Olympians' who have wholly forgotten how it feels to be young" — a theme later explored by J. M. Barrie and other authors.
—Wikipedia